Final answer:
The macOS feature for remote file and application access is 'Back to My Mac', but it has been discontinued as of macOS 10.14 in favor of services like iCloud Drive.
Step-by-step explanation:
The feature included with macOS that allows a remote user to view and change files, folders, and applications on the local computer is Back to My Mac. This feature was part of iCloud and it let users set up a network of Mac computers that could be accessed remotely, including access to documents, applications, and screen sharing capabilities. However, it's worth noting that 'Back to My Mac' has been discontinued as of macOS Mojave (macOS 10.14). Modern alternatives include using iCloud Drive for file access or screen sharing services for remote desktop access.